Joerg R.
Mohammad as I said, all expire. But I still used older expired Resin, it depends on how you store it, as I said. You will never get that Resin you want, that don't expire. It's a chemical process you can't stop.

Mohammad Adl
Hi Joerg ,Thank you very much for your guidance- it's true. In good condition, it only will increase expiration from 6 months to 2 years- but I wanted over 10 years. Because it is not possible to buy for my country.